XL-200P, XL-200Pi, XL-185P, and XL-185Pi Standard Capacity Battery. ^^ Lithium Ion Rechargeable Battery Pack ^^ 7.2 Volt ^^ 3100 mAh. ^^ UL Certified Japanese performance-grade power cells which are proven to deliver maximum Battery Run Time and Total Cycle Life. ^^ IP67 Waterproof. IonPure IZA Technology. UN 38.3 Certified. TAA-Compliant ^^ Lithium Ion Rechargeable Battery Pack ^^ 7.2 Volt ^^ 3540 mAh